The lymphatic system is part of the immune system of the human body. Its roles are: collection and delivery of excess intercellular fluid into the blood, absorption of fats from the intestines and their transfer into the blood, the formation of lymphocytes and the body’s defense against disease.
It consists of the lymph, lymph vessels (lymph flow) and lymphatic organs which include the bone marrow, thymus, spleen, tonsils and lymph nodes. The lymphatic system also includes accumulations of lymph tissue located in the mucous membranes of the digestive and respiratory systems.
Lymph is a clear fluid found in lymphatic vessels. It has more than blood, and its tasks are to help maintain osmotic pressure, it is an essential part of immunity, it transmits hormones and lipids, and it transports waste products from tissues.